Abstract
Purpose: The aim of the present study was to assess the recurrence and retreatment rate after coil embolization of unruptured internal carotid artery-posterior communicating artery aneurysms (IC‑PC AN) classified according to the development of the posterior communicating artery (Pcom A) and to determine the risk factor of recurrence.
Methods: The authors examined 42 patients treated with coil embolization for IC‑PC AN in our department. We divided the IC‑PC ANs into 3 groups according to the development of the Pcom A as follows: fetal (group F), adult (group A), and hypoplastic types (group H). Patient data, angiographic findings, treatment information, and follow-up data were analyzed. We also analyzed the recurrence and retreatment rates, and determined the risk factor of recurrence.
Results: The recurrence and retreatment rates had no significant differences among the groups. We found higher-risk aneurysm (large aneurysm of >10 mm, partially thrombosed aneurysm, and recurrent aneurysm post clipping) was the only risk factor of recurrence after coil embolization.
Conclusion: The recurrence rate of Pcom A-preserving coil embolization for IC‑PC AN was not higher than that of coil embolization for IC‑PC AN with hypoplastic Pcom A.
